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F10 / F11 (2011 - 2016)
The sixth generation of the BMW 5 Series Sedan (F10) was produced from 2011 - 2016 with LCI updates arriving in 2014. In the US BMW offered a hatchback 5 Series Gran Truismo (F07) and the rest of the world also go a Station Wagon/Touring version F11.

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  #1  
Old 08-24-2016, 05:22 AM
jay_e_jay jay_e_jay is offline
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Vibration when braking issue, Need Help!

Ok, so first Good morning and thanks ahead for your attention and assistance.

Hereís the situation, the pass week or two my 11 550i has been experience vibrations when I am braking. So I figured it must be time for front brake and rotor replacement, even though the vehicle status said I had another 20k before needing to replace. Yesterday I took the passage side tire off in plans to begin inspect, removal and installation. Looked and the pads and rotors look like they still have plenty of life. A little additional background about a month ago, I had some suspension work done, got the alignment done and then had to take it back for some suspension rework. But the local indy shop didnít redo the alignment. So I am wondering if that could be the cause of the recent vibration issues and wanted to get you alls thoughts.

Any thoughts would be greatly appreciated!!

Thanks and have a AWESOME day!
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  #2  
Old 08-24-2016, 05:54 AM
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X3emist X3emist is offline
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Warped rotor

You have a warped brake rotor or rotors. You have to check the run out on them. If you are under warranty they will replace them. BMW is getting so cheap now they often don't replace rotors when they replace pads. They used to always replace both.
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  #3  
Old 08-24-2016, 08:53 AM
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markl53 markl53 is offline
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Quote:
Originally Posted by X3emist View Post
You have a warped brake rotor or rotors. You have to check the run out on them. If you are under warranty they will replace them. BMW is getting so cheap now they often don't replace rotors when they replace pads. They used to always replace both.
If the rotors are within spec whe pads are replaced, why should they be replaced? Not sure that is "cheapness". Sounds more like "logic".
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Last edited by markl53; 08-24-2016 at 07:44 PM.
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  #4  
Old 08-24-2016, 02:26 PM
Blauthor Blauthor is offline
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Re:jay_e_jay Comment. I had the same thing happen over a month ago and with a couple trips to the dealer they found nothing wrong. (Wasn't looking hard enough I suppose.) The third time I wasn't taking nothing found wrong for an answer and put the tech in the car with me and drove him until it appeared. He took the car in after feeling and hearing the noise and found out there was a couple loose suspension nuts and a ball joint that needed seating. This was a by product of me having an alignment either. The point is, it doesn't have to be a warped rotor when this happens, oh, and the strange thing was there were never any rolling vibration.
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Old 08-24-2016, 03:38 PM
jay_e_jay jay_e_jay is offline
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Thanks guys. I am going to take the car back to the shop and make someone ride with me. I know how to get it to happen pretty consistently. If the rotors in up being warped, I hope the shop will at least resurface them instead of trying to sell two new ones. We will see....
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Old 08-24-2016, 06:25 PM
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Quote:
Originally Posted by jay_e_jay View Post
Thanks guys. I am going to take the car back to the shop and make someone ride with me. I know how to get it to happen pretty consistently. If the rotors in up being warped, I hope the shop will at least resurface them instead of trying to sell two new ones. We will see....
Not much extra metal on those rotors to remove runout. You're better off replacing them if they are no longer true.
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  #7  
Old 08-24-2016, 06:40 PM
kajer kajer is offline
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I have an issue at speeds over 40. The first decent brake (getting off the freeway) if I lightly brake, I'll notice some vibration, but if I apply more pressure, the shaking stops and it's perfectly smooth braking, then I can lighten up. It's like the brakes need to "bite" before they are smooth.

I also have ~20k before a front brake service, but am only working on a CPO warranty. If the brakes get any worse, it might be time to book some time at pit row and do my first self-service. Brakes, Oil / filter, air cleaner, etc.
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Old 08-24-2016, 07:24 PM
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CALWATERBOY DUE CALWATERBOY DUE is online now
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OK kajer, could be any number of things from rotor buildup to a bad bushing. If you'd like to diagnose the rotors, remove tire[s], emory cloth the swept area, retorque lug bolts, go for a ride. Pulsation gone? Uneven pad buildup on rotor[s]. No? It's not the rotors.

Wait...do they pulse when cold?

If you eliminate the rotors it's time for an expert. Suspension/tires & calipers need an integrity check. Shocks definitely part o'that.


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Last edited by CALWATERBOY DUE; 08-24-2016 at 07:27 PM.
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  #9  
Old 08-26-2016, 10:59 AM
kajer kajer is offline
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It mainly happens at the first brake over 40mph after the brakes have been cooled enough. It feels like the pads need to seat. Once that's done, I have no issues with the brakes until they cool off again.

I should mention that the wobble happens with VERY light braking effort. Once the brakes grab, and the vibration stops, I can brake all day long and it's very smooth.
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